tree f8c21b06f980dd2585c4c13d6cb3bb668a3a0fea
parent 5f818d676ac455bbc812ffaaf5bf780be5465114
author Shiraz Saleem <shiraz.saleem@intel.com> 1553791785 -0500
committer Jason Gunthorpe <jgg@mellanox.com> 1553793207 -0300

RDMA/mthca: Use correct sizing on buffers holding page DMA addresses

The buffer that holds the page DMA addresses is sized off umem->nmap.
This can potentially cause out of bound accesses on the PBL array when
iterating the umem DMA-mapped SGL. This is because if umem pages are
combined, umem->nmap can be much lower than the number of system pages
in umem.

Use ib_umem_num_pages() to size this buffer.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>